$ git clone -n https://src.fedoraproject.org/rpms/perl-Test2-Tools-Explain.git /var/lib/mock/f45-build-26928-620/root/chroot_tmpdir/scmroot/perl-Test2-Tools-Explain
Cloning into '/var/lib/mock/f45-build-26928-620/root/chroot_tmpdir/scmroot/perl-Test2-Tools-Explain'...
$ git fetch origin a302d05ff826f9bf41e906204618ef07465f929b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Test2-Tools-Explain
 * [new ref]         a302d05ff826f9bf41e906204618ef07465f929b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a302d05 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild