$ git clone -n https://src.fedoraproject.org/rpms/sparkleshare.git /var/lib/mock/f40-build-788342-135103/root/chroot_tmpdir/scmroot/sparkleshare
Cloning into '/var/lib/mock/f40-build-788342-135103/root/chroot_tmpdir/scmroot/sparkleshare'...
$ git fetch origin b098f7d5a3d2e7a455f2c3eb46d81f0922c4eda4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sparkleshare
 * [new ref]         b098f7d5a3d2e7a455f2c3eb46d81f0922c4eda4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b098f7d Release 3.38 (#2227570) and dropping i686 support