$ git clone -n https://src.fedoraproject.org/rpms/splix.git /var/lib/mock/f45-build-36398-704/root/chroot_tmpdir/scmroot/splix
Cloning into '/var/lib/mock/f45-build-36398-704/root/chroot_tmpdir/scmroot/splix'...
$ git fetch origin 3b08ba73791dbb68cc3554a03d9fe16df8fd7f5a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/splix
 * [new ref]         3b08ba73791dbb68cc3554a03d9fe16df8fd7f5a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b08ba7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild