$ git clone -n https://src.fedoraproject.org/rpms/perl-MP3-Info.git /var/lib/mock/f45-build-24610-605/root/chroot_tmpdir/scmroot/perl-MP3-Info
Cloning into '/var/lib/mock/f45-build-24610-605/root/chroot_tmpdir/scmroot/perl-MP3-Info'...
$ git fetch origin 86422d5f56a69648779dd3ba6c4f6bbc44677fb8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-MP3-Info
 * [new ref]         86422d5f56a69648779dd3ba6c4f6bbc44677fb8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 86422d5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild