$ git clone -n https://src.fedoraproject.org/rpms/foma.git /var/lib/mock/f45-build-9133-399/root/chroot_tmpdir/scmroot/foma
Cloning into '/var/lib/mock/f45-build-9133-399/root/chroot_tmpdir/scmroot/foma'...
$ git fetch origin 974ce1a4970610f25c76c5f34ebdc454e540369b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/foma
 * [new ref]         974ce1a4970610f25c76c5f34ebdc454e540369b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 974ce1a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild