$ git clone -n https://github.com/xcp-ng-rpms/libevent.git /var/lib/mock/v8.3-incoming-10630-29184/root/chroot_tmpdir/scmroot/libevent
Cloning into '/var/lib/mock/v8.3-incoming-10630-29184/root/chroot_tmpdir/scmroot/libevent'...
$ git fetch origin 985d8380a5323e660f492ea633db38118214c3d7:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/libevent
 * [new ref]         985d8380a5323e660f492ea633db38118214c3d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 985d838 Merge pull request #2 from xcp-ng-rpms/pcoval/review/master