$ git clone -n https://github.com/xcp-ng-rpms/stunnel.git /var/lib/mock/v8.3-u-pcoval2-10146-28745/root/chroot_tmpdir/scmroot/stunnel
Cloning into '/var/lib/mock/v8.3-u-pcoval2-10146-28745/root/chroot_tmpdir/scmroot/stunnel'...
$ git fetch origin 2917d65fff11953e0e3c594a72c2590c223a1357:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/stunnel
 * [new ref]         2917d65fff11953e0e3c594a72c2590c223a1357 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2917d65 bump release for test build