$ git clone -n https://src.fedoraproject.org/rpms/GeographicLib.git /var/lib/mock/f42-build-3181728-40950/root/chroot_tmpdir/scmroot/GeographicLib
Cloning into '/var/lib/mock/f42-build-3181728-40950/root/chroot_tmpdir/scmroot/GeographicLib'...
$ git fetch origin 07cf5e1060e3c9d4904c17bb2a27465355d3ec50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/GeographicLib
 * [new ref]         07cf5e1060e3c9d4904c17bb2a27465355d3ec50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 07cf5e1 Update to 2.5