$ git clone -n https://github.com/xcp-ng-rpms/libtpms /var/lib/mock/v8.3-incoming-10668-29218/root/chroot_tmpdir/scmroot/libtpms
Cloning into '/var/lib/mock/v8.3-incoming-10668-29218/root/chroot_tmpdir/scmroot/libtpms'...
$ git fetch origin 39e1304dfbd29889b2b9c52a7edfe42a0d1fe112:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/libtpms
 * [new ref]         39e1304dfbd29889b2b9c52a7edfe42a0d1fe112 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39e1304 Merge pull request #2 from xcp-ng-rpms/XCPNG-2710