$ git clone -n https://src.fedoraproject.org/rpms/stunnel.git /var/lib/mock/f39-build-1461241-33249/root/chroot_tmpdir/scmroot/stunnel
Cloning into '/var/lib/mock/f39-build-1461241-33249/root/chroot_tmpdir/scmroot/stunnel'...
$ git fetch origin 6750ae0c6e34434e008a748452d5589ccbdbb080:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stunnel
 * [new ref]         6750ae0c6e34434e008a748452d5589ccbdbb080 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6750ae0 New upstream release 5.71