$ git clone -n https://src.fedoraproject.org/rpms/ghc-DAV.git /var/lib/mock/f38-build-722408-98803/root/chroot_tmpdir/scmroot/ghc-DAV
Cloning into '/var/lib/mock/f38-build-722408-98803/root/chroot_tmpdir/scmroot/ghc-DAV'...
$ git fetch origin 1c5869be6dd88c9daf9e6b3bf0f09d7e3e8c57c6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-DAV
 * [new ref]         1c5869be6dd88c9daf9e6b3bf0f09d7e3e8c57c6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c5869b Convert to %autorelease and %autochangelog