$ git clone -n https://github.com/xcp-ng-rpms/p11-kit /var/lib/mock/v8.3-u-pcoval2-11038-29473/root/chroot_tmpdir/scmroot/p11-kit
Cloning into '/var/lib/mock/v8.3-u-pcoval2-11038-29473/root/chroot_tmpdir/scmroot/p11-kit'...
$ git fetch origin a9a090a018722be6a593c3f528fe12249d1e9c20:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/p11-kit
 * [new ref]         a9a090a018722be6a593c3f528fe12249d1e9c20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a9a090a bump release for test build