$ git clone -n https://src.fedoraproject.org/rpms/golang-github-appc-docker2aci.git /var/lib/mock/f38-build-710075-93229/root/chroot_tmpdir/scmroot/golang-github-appc-docker2aci
Cloning into '/var/lib/mock/f38-build-710075-93229/root/chroot_tmpdir/scmroot/golang-github-appc-docker2aci'...
$ git fetch origin ebff8ad4b8ed664e5289c0cc6f82acecfe134447:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-appc-docker2aci
 * [new ref]         ebff8ad4b8ed664e5289c0cc6f82acecfe134447 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ebff8ad Rebuild to fix FTBFS