$ git clone -n https://src.fedoraproject.org/rpms/ghc-reflection.git /var/lib/mock/f38-build-side-42-init-devel-701449-27067/root/chroot_tmpdir/scmroot/ghc-reflection
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-701449-27067/root/chroot_tmpdir/scmroot/ghc-reflection'...
$ git fetch origin 20a8b6662f1b609c8bcc20aadf2f620446203064:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-reflection
 * [new ref]         20a8b6662f1b609c8bcc20aadf2f620446203064 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20a8b66 Convert to %autorelease and %autochangelog