$ git clone -n https://github.com/xcp-ng-rpms/wget.git /var/lib/mock/v8.3-u-pcoval1-11098-29524/root/chroot_tmpdir/scmroot/wget
Cloning into '/var/lib/mock/v8.3-u-pcoval1-11098-29524/root/chroot_tmpdir/scmroot/wget'...
$ git fetch origin 1780b14c124267c2806ba6fb9b8daae62574db9b:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/wget
 * [new ref]         1780b14c124267c2806ba6fb9b8daae62574db9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1780b14 bump release for test build