$ git clone -n https://src.fedoraproject.org/rpms/perl-User-Identity.git /var/lib/mock/f41-build-side-1-2933362-35202/root/chroot_tmpdir/scmroot/perl-User-Identity
Cloning into '/var/lib/mock/f41-build-side-1-2933362-35202/root/chroot_tmpdir/scmroot/perl-User-Identity'...
$ git fetch origin 3ab29249a741d23570917035d6df324c8bd4f3c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-User-Identity
 * [new ref]         3ab29249a741d23570917035d6df324c8bd4f3c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ab2924 convert GPL+ or Artistic license to SPDX