$ git clone -n https://src.fedoraproject.org/rpms/nomacs.git /var/lib/mock/f40-build-803203-144204/root/chroot_tmpdir/scmroot/nomacs
Cloning into '/var/lib/mock/f40-build-803203-144204/root/chroot_tmpdir/scmroot/nomacs'...
$ git fetch origin 48750ede06d999d322e39ca8d01a72804e697c9d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nomacs
 * [new ref]         48750ede06d999d322e39ca8d01a72804e697c9d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 48750ed Version bump