$ git clone -n https://src.fedoraproject.org/rpms/ghc-optparse-applicative.git /var/lib/mock/f38-build-side-42-init-devel-1027929-29693/root/chroot_tmpdir/scmroot/ghc-optparse-applicative
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1027929-29693/root/chroot_tmpdir/scmroot/ghc-optparse-applicative'...
$ git fetch origin 6aec3c436a579dd50a06d69b6baa7699905c5875:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-optparse-applicative
 * [new ref]         6aec3c436a579dd50a06d69b6baa7699905c5875 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6aec3c4 Convert to %autorelease and %autochangelog