$ git clone -n https://src.fedoraproject.org/rpms/ghc-libxml-sax.git /var/lib/mock/f41-build-850097-165133/root/chroot_tmpdir/scmroot/ghc-libxml-sax
Cloning into '/var/lib/mock/f41-build-850097-165133/root/chroot_tmpdir/scmroot/ghc-libxml-sax'...
$ git fetch origin 711a6c4ae1f7586e003b0cda244c889ff1ae8e52:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-libxml-sax
 * [new ref]         711a6c4ae1f7586e003b0cda244c889ff1ae8e52 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 711a6c4 bump release