$ git clone -n https://src.fedoraproject.org/rpms/xbase.git /var/lib/mock/f41-build-755456-13413/root/chroot_tmpdir/scmroot/xbase
Cloning into '/var/lib/mock/f41-build-755456-13413/root/chroot_tmpdir/scmroot/xbase'...
$ git fetch origin d0573e612b011d8d9c32b97eb1de507b895721ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xbase
 * [new ref]         d0573e612b011d8d9c32b97eb1de507b895721ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0573e6 Eliminate use of obsolete %patchN syntax (#2283636)