$ git clone -n https://src.fedoraproject.org/rpms/perl-End.git /var/lib/mock/f45-build-23344-597/root/chroot_tmpdir/scmroot/perl-End
Cloning into '/var/lib/mock/f45-build-23344-597/root/chroot_tmpdir/scmroot/perl-End'...
$ git fetch origin 2852abfad256792cf86427ce05db4aa9533f4e38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-End
 * [new ref]         2852abfad256792cf86427ce05db4aa9533f4e38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2852abf Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild