$ git clone -n https://src.fedoraproject.org/rpms/fstrcmp.git /var/lib/mock/f45-build-9304-401/root/chroot_tmpdir/scmroot/fstrcmp
Cloning into '/var/lib/mock/f45-build-9304-401/root/chroot_tmpdir/scmroot/fstrcmp'...
$ git fetch origin 11afeb94edabffc3d8f2b994cc39e2de23450eb1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fstrcmp
 * [new ref]         11afeb94edabffc3d8f2b994cc39e2de23450eb1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 11afeb9 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild