$ git clone -n https://src.fedoraproject.org/rpms/perl-String-License.git /var/lib/mock/f45-build-26287-616/root/chroot_tmpdir/scmroot/perl-String-License
Cloning into '/var/lib/mock/f45-build-26287-616/root/chroot_tmpdir/scmroot/perl-String-License'...
$ git fetch origin a164e6800b2f716502b6372d8e9e403abea39667:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-String-License
 * [new ref]         a164e6800b2f716502b6372d8e9e403abea39667 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a164e68 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild