$ git clone -n https://github.com/xcp-ng-rpms/p11-kit /var/lib/mock/v8.3-u-pcoval2-11055-29489/root/chroot_tmpdir/scmroot/p11-kit
Cloning into '/var/lib/mock/v8.3-u-pcoval2-11055-29489/root/chroot_tmpdir/scmroot/p11-kit'...
$ git fetch origin 6476a28f898424f3d4d3682f59f016614398fba7:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/p11-kit
 * [new ref]         6476a28f898424f3d4d3682f59f016614398fba7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6476a28 bump release for test build