$ git clone -n https://src.fedoraproject.org/rpms/mongo-c-driver.git /var/lib/mock/f40-build-757357-119353/root/chroot_tmpdir/scmroot/mongo-c-driver
Cloning into '/var/lib/mock/f40-build-757357-119353/root/chroot_tmpdir/scmroot/mongo-c-driver'...
$ git fetch origin 36583e92f50eb21d383aeafb450190711c664d24:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mongo-c-driver
 * [new ref]         36583e92f50eb21d383aeafb450190711c664d24 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 36583e9 v1.25.2