$ git clone -n https://src.fedoraproject.org/rpms/ghc-cryptohash-md5.git /var/lib/mock/f38-build-side-42-init-devel-700925-27067/root/chroot_tmpdir/scmroot/ghc-cryptohash-md5
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-700925-27067/root/chroot_tmpdir/scmroot/ghc-cryptohash-md5'...
$ git fetch origin 920ea9264ab559c2ad4eea56af9fc6f0f667a009:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cryptohash-md5
 * [new ref]         920ea9264ab559c2ad4eea56af9fc6f0f667a009 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 920ea92 Convert to %autorelease and %autochangelog