$ git clone -n https://src.fedoraproject.org/rpms/xlog.git /var/lib/mock/f41-build-side-1-2671346-29139/root/chroot_tmpdir/scmroot/xlog
Cloning into '/var/lib/mock/f41-build-side-1-2671346-29139/root/chroot_tmpdir/scmroot/xlog'...
$ git fetch origin 0c4858fdbd2baf624284dcb3921c345ec2ce9e23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xlog
 * [new ref]         0c4858fdbd2baf624284dcb3921c345ec2ce9e23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c4858f convert GPLv3 license to SPDX