$ git clone -n https://github.com/xcp-ng-rpms/p11-kit /var/lib/mock/v8.3-u-pcoval2-11057-29491/root/chroot_tmpdir/scmroot/p11-kit
Cloning into '/var/lib/mock/v8.3-u-pcoval2-11057-29491/root/chroot_tmpdir/scmroot/p11-kit'...
$ git fetch origin 1426f3c792ecdefcc42b76456e7b9771cfd0b3f6:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/p11-kit
 * [new ref]         1426f3c792ecdefcc42b76456e7b9771cfd0b3f6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1426f3c bump release for test build