$ git clone -n https://src.fedoraproject.org/rpms/libreoffice.git /var/lib/mock/f40-build-786128-134186/root/chroot_tmpdir/scmroot/libreoffice
Cloning into '/var/lib/mock/f40-build-786128-134186/root/chroot_tmpdir/scmroot/libreoffice'...
$ git fetch origin 905401bb77d03fde750d9b3f4ca2e7a4c0230c68:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libreoffice
 * [new ref]         905401bb77d03fde750d9b3f4ca2e7a4c0230c68 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 905401b Draw requires oglrans