$ git clone -n https://src.fedoraproject.org/rpms/ghc-vector-builder.git /var/lib/mock/f38-build-side-42-init-devel-939319-28757/root/chroot_tmpdir/scmroot/ghc-vector-builder
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-939319-28757/root/chroot_tmpdir/scmroot/ghc-vector-builder'...
$ git fetch origin 92535bbba1f5bfc4653507fd48664c237e587891:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-vector-builder
 * [new ref]         92535bbba1f5bfc4653507fd48664c237e587891 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92535bb Convert to %autorelease and %autochangelog