$ git clone -n https://src.fedoraproject.org/rpms/python-nifti-mrs.git /var/lib/mock/f40-build-1504175-23883/root/chroot_tmpdir/scmroot/python-nifti-mrs
Cloning into '/var/lib/mock/f40-build-1504175-23883/root/chroot_tmpdir/scmroot/python-nifti-mrs'...
$ git fetch origin b176133fab2c92e7bee5dc92fb7b4318ca50995d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nifti-mrs
 * [new ref]         b176133fab2c92e7bee5dc92fb7b4318ca50995d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b176133 Update to 1.3.0 (close RHBZ#2295537)