$ git clone -n https://src.fedoraproject.org/rpms/ghc-aws.git /var/lib/mock/f38-build-side-42-init-devel-985908-29065/root/chroot_tmpdir/scmroot/ghc-aws
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-985908-29065/root/chroot_tmpdir/scmroot/ghc-aws'...
$ git fetch origin b93065250789e678e6016f9c5b20b37a3156bef2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-aws
 * [new ref]         b93065250789e678e6016f9c5b20b37a3156bef2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b930652 Convert to %autorelease and %autochangelog