$ git clone -n https://github.com/xcp-ng-rpms/libtpms.git /var/lib/mock/v8.3-u-pcoval2-10586-29141/root/chroot_tmpdir/scmroot/libtpms
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10586-29141/root/chroot_tmpdir/scmroot/libtpms'...
$ git fetch origin 9de55b317a44a58d6c1434403747b847d2f0c63c:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/libtpms
 * [new ref]         9de55b317a44a58d6c1434403747b847d2f0c63c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9de55b3 bump release for test build