$ git clone -n https://src.fedoraproject.org/rpms/ghc-connection.git /var/lib/mock/f38-build-side-42-init-devel-1094160-30068/root/chroot_tmpdir/scmroot/ghc-connection
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1094160-30068/root/chroot_tmpdir/scmroot/ghc-connection'...
$ git fetch origin d83128fd3bd463e87085e7ca598a17085f2e3fd3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-connection
 * [new ref]         d83128fd3bd463e87085e7ca598a17085f2e3fd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d83128f Convert to %autorelease and %autochangelog