$ git clone -n https://src.fedoraproject.org/rpms/filelight.git /var/lib/mock/f39-build-1629236-39530/root/chroot_tmpdir/scmroot/filelight
Cloning into '/var/lib/mock/f39-build-1629236-39530/root/chroot_tmpdir/scmroot/filelight'...
$ git fetch origin b949949711f05698dcc239687832cff54e22ea60:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/filelight
 * [new ref]         b949949711f05698dcc239687832cff54e22ea60 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b949949 23.08.2