$ git clone -n https://github.com/xcp-ng-rpms/p11-kit /var/lib/mock/v8.3-u-pcoval1-11025-29457/root/chroot_tmpdir/scmroot/p11-kit
Cloning into '/var/lib/mock/v8.3-u-pcoval1-11025-29457/root/chroot_tmpdir/scmroot/p11-kit'...
$ git fetch origin 4bf94cc5a54460dbdcc0b4bafc8de36cfcea91f2:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/p11-kit
 * [new ref]         4bf94cc5a54460dbdcc0b4bafc8de36cfcea91f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4bf94cc bump release for test build