$ git clone -n https://src.fedoraproject.org/rpms/folks.git /var/lib/mock/f38-build-710087-93229/root/chroot_tmpdir/scmroot/folks
Cloning into '/var/lib/mock/f38-build-710087-93229/root/chroot_tmpdir/scmroot/folks'...
$ git fetch origin 0ca90c9cddccb65a67360f6d528405760ac88b0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/folks
 * [new ref]         0ca90c9cddccb65a67360f6d528405760ac88b0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ca90c9 Update to 0.15.6