$ git clone -n https://src.fedoraproject.org/rpms/ghc-language-java.git /var/lib/mock/f38-build-side-42-init-devel-947282-28778/root/chroot_tmpdir/scmroot/ghc-language-java
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-947282-28778/root/chroot_tmpdir/scmroot/ghc-language-java'...
$ git fetch origin c75f03b6f811f3debfc1d7683b15555a67b016b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-language-java
 * [new ref]         c75f03b6f811f3debfc1d7683b15555a67b016b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c75f03b Convert to %autorelease and %autochangelog