$ git clone -n https://src.fedoraproject.org/rpms/perl-Makefile-DOM.git /var/lib/mock/f45-build-24652-605/root/chroot_tmpdir/scmroot/perl-Makefile-DOM
Cloning into '/var/lib/mock/f45-build-24652-605/root/chroot_tmpdir/scmroot/perl-Makefile-DOM'...
$ git fetch origin 1cef47bd0f64d6c074b73352c40dd30f2cb9e600:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Makefile-DOM
 * [new ref]         1cef47bd0f64d6c074b73352c40dd30f2cb9e600 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1cef47b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild