$ git clone -n https://src.fedoraproject.org/rpms/perl-Convert-PEM.git /var/lib/mock/f45-build-22579-593/root/chroot_tmpdir/scmroot/perl-Convert-PEM
Cloning into '/var/lib/mock/f45-build-22579-593/root/chroot_tmpdir/scmroot/perl-Convert-PEM'...
$ git fetch origin a4d082abd8c1e5ef8c48e032991ea1ccc1f05556:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Convert-PEM
 * [new ref]         a4d082abd8c1e5ef8c48e032991ea1ccc1f05556 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4d082a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild