$ git clone -n https://src.fedoraproject.org/rpms/gns3-server.git /var/lib/mock/f39-build-1869128-42617/root/chroot_tmpdir/scmroot/gns3-server
Cloning into '/var/lib/mock/f39-build-1869128-42617/root/chroot_tmpdir/scmroot/gns3-server'...
$ git fetch origin b55e7bf3612b265e66b1ee70bd743b719f43f01f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gns3-server
 * [new ref]         b55e7bf3612b265e66b1ee70bd743b719f43f01f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b55e7bf Update to 2.2.44.1