$ git clone -n https://src.fedoraproject.org/rpms/i3lock.git /var/lib/mock/f40-build-2670078-67296/root/chroot_tmpdir/scmroot/i3lock
Cloning into '/var/lib/mock/f40-build-2670078-67296/root/chroot_tmpdir/scmroot/i3lock'...
$ git fetch origin aa83b2535f3ed145e35fbb21d67f238bf1f41f2e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/i3lock
 * [new ref]         aa83b2535f3ed145e35fbb21d67f238bf1f41f2e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa83b25 New upstream release 2.15, fixes rhbz#2269789