$ git clone -n https://src.fedoraproject.org/rpms/ghc-HaXml.git /var/lib/mock/f39-build-1918553-42935/root/chroot_tmpdir/scmroot/ghc-HaXml
Cloning into '/var/lib/mock/f39-build-1918553-42935/root/chroot_tmpdir/scmroot/ghc-HaXml'...
$ git fetch origin 8e7aaf11878285f93505e2c1604d68ed81e53abc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-HaXml
 * [new ref]         8e7aaf11878285f93505e2c1604d68ed81e53abc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e7aaf1 https://hackage.haskell.org/package/HaXml-1.25.13/changelog