$ git clone -n https://src.fedoraproject.org/rpms/perl-Email-MessageID.git /var/lib/mock/f45-build-23312-596/root/chroot_tmpdir/scmroot/perl-Email-MessageID
Cloning into '/var/lib/mock/f45-build-23312-596/root/chroot_tmpdir/scmroot/perl-Email-MessageID'...
$ git fetch origin 9eb9a74a9a99f677627ef8a845f962ffde617bfb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Email-MessageID
 * [new ref]         9eb9a74a9a99f677627ef8a845f962ffde617bfb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9eb9a74 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild