$ git clone -n https://src.fedoraproject.org/rpms/ghc-ed25519.git /var/lib/mock/f38-build-side-42-init-devel-665222-26647/root/chroot_tmpdir/scmroot/ghc-ed25519
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-665222-26647/root/chroot_tmpdir/scmroot/ghc-ed25519'...
$ git fetch origin ef0adac80dc1f4cf42c43b8886850dc507ce03d2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-ed25519
 * [new ref]         ef0adac80dc1f4cf42c43b8886850dc507ce03d2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef0adac Convert to %autorelease and %autochangelog