$ git clone -n https://src.fedoraproject.org/rpms/perl-Authen-DigestMD5.git /var/lib/mock/f45-build-21792-588/root/chroot_tmpdir/scmroot/perl-Authen-DigestMD5
Cloning into '/var/lib/mock/f45-build-21792-588/root/chroot_tmpdir/scmroot/perl-Authen-DigestMD5'...
$ git fetch origin 7d8f0140f1652fcfd4d1569cdf38a935961ac4e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Authen-DigestMD5
 * [new ref]         7d8f0140f1652fcfd4d1569cdf38a935961ac4e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d8f014 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild