$ git clone -n https://src.fedoraproject.org/rpms/freedoom-freedm.git /var/lib/mock/f40-build-2437785-60862/root/chroot_tmpdir/scmroot/freedoom-freedm
Cloning into '/var/lib/mock/f40-build-2437785-60862/root/chroot_tmpdir/scmroot/freedoom-freedm'...
$ git fetch origin 2cd72a4754ea76997fa9ceeabe9359033f243f66:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/freedoom-freedm
 * [new ref]         2cd72a4754ea76997fa9ceeabe9359033f243f66 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2cd72a4 0.13.0