$ git clone -n https://github.com/xcp-ng-rpms/libtpms.git /var/lib/mock/v8.3-u-prebuild-9271-28052/root/chroot_tmpdir/scmroot/libtpms
Cloning into '/var/lib/mock/v8.3-u-prebuild-9271-28052/root/chroot_tmpdir/scmroot/libtpms'...
$ git fetch origin f9ba0e7e90fef24089d7cc3fc89bef6690d9471d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/libtpms
 * [new ref]         f9ba0e7e90fef24089d7cc3fc89bef6690d9471d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9ba0e7 bump release for test build