$ git clone -n https://github.com/xcp-ng-rpms/p11-kit /var/lib/mock/v8.3-u-pcoval1-11065-29500/root/chroot_tmpdir/scmroot/p11-kit
Cloning into '/var/lib/mock/v8.3-u-pcoval1-11065-29500/root/chroot_tmpdir/scmroot/p11-kit'...
$ git fetch origin b2bab27c1b3b7111eac8c86cd1f4fd6481aa3771:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/p11-kit
 * [new ref]         b2bab27c1b3b7111eac8c86cd1f4fd6481aa3771 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2bab27 bump release for test build