$ git clone -n https://github.com/xcp-ng-rpms/p11-kit /var/lib/mock/v8.3-u-pcoval2-10928-29404/root/chroot_tmpdir/scmroot/p11-kit
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10928-29404/root/chroot_tmpdir/scmroot/p11-kit'...
$ git fetch origin 7c3e7dc1521229bc24e960104638229089a17030:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/p11-kit
 * [new ref]         7c3e7dc1521229bc24e960104638229089a17030 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c3e7dc bump release for test build