$ git clone -n https://src.fedoraproject.org/rpms/perl-Carmel.git /var/lib/mock/f45-build-22205-590/root/chroot_tmpdir/scmroot/perl-Carmel
Cloning into '/var/lib/mock/f45-build-22205-590/root/chroot_tmpdir/scmroot/perl-Carmel'...
$ git fetch origin eb73a7171327ea5107d292a13df70097bc97338b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Carmel
 * [new ref]         eb73a7171327ea5107d292a13df70097bc97338b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb73a71 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild