$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-DifferenceMarkup.git /var/lib/mock/f45-build-27473-624/root/chroot_tmpdir/scmroot/perl-XML-DifferenceMarkup
Cloning into '/var/lib/mock/f45-build-27473-624/root/chroot_tmpdir/scmroot/perl-XML-DifferenceMarkup'...
$ git fetch origin 2e5d03ab1d0a36792a0a0ad6f9ab9270198c1c47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-DifferenceMarkup
 * [new ref]         2e5d03ab1d0a36792a0a0ad6f9ab9270198c1c47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e5d03a Perl 5.44 rebuild