$ git clone -n https://github.com/xcp-ng-rpms/wget.git /var/lib/mock/v8.3-u-pcoval2-10089-28710/root/chroot_tmpdir/scmroot/wget
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10089-28710/root/chroot_tmpdir/scmroot/wget'...
$ git fetch origin 26fd0e61ac5ffcf19646f203dd89553d7252cac2:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/wget
 * [new ref]         26fd0e61ac5ffcf19646f203dd89553d7252cac2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26fd0e6 bump release for test build