$ git clone -n https://src.fedoraproject.org/rpms/git-tools.git /var/lib/mock/f41-build-side-1-2637564-26328/root/chroot_tmpdir/scmroot/git-tools
Cloning into '/var/lib/mock/f41-build-side-1-2637564-26328/root/chroot_tmpdir/scmroot/git-tools'...
$ git fetch origin 0c1f81c34823cd2e16c0b8c6e5c804471f140462:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/git-tools
 * [new ref]         0c1f81c34823cd2e16c0b8c6e5c804471f140462 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0c1f81c convert GPLv3+ license to SPDX