$ git clone -n https://github.com/xcp-ng-rpms/libempserver.git /var/lib/mock/v9.0-u-ydi1-11178-29580/root/chroot_tmpdir/scmroot/libempserver
Cloning into '/var/lib/mock/v9.0-u-ydi1-11178-29580/root/chroot_tmpdir/scmroot/libempserver'...
$ git fetch origin ee2cbb57d05d922c88dc3a42f44e8e0d895fa43d:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/libempserver
 * [new ref]         ee2cbb57d05d922c88dc3a42f44e8e0d895fa43d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee2cbb5 bump release for test build