$ git clone -n https://github.com/xcp-ng-rpms/p11-kit /var/lib/mock/v8.3-u-pcoval2-11043-29479/root/chroot_tmpdir/scmroot/p11-kit
Cloning into '/var/lib/mock/v8.3-u-pcoval2-11043-29479/root/chroot_tmpdir/scmroot/p11-kit'...
$ git fetch origin 8074239579c822df13e3453b7e7ffc3957b91bf0:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/p11-kit
 * [new ref]         8074239579c822df13e3453b7e7ffc3957b91bf0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8074239 bump release for test build