$ git clone -n https://src.fedoraproject.org/rpms/lagrange.git /var/lib/mock/f40-build-803155-144192/root/chroot_tmpdir/scmroot/lagrange
Cloning into '/var/lib/mock/f40-build-803155-144192/root/chroot_tmpdir/scmroot/lagrange'...
$ git fetch origin 79b2c085c7c5135b6011965ffe0b9e67491f6584:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lagrange
 * [new ref]         79b2c085c7c5135b6011965ffe0b9e67491f6584 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 79b2c08 Update to 1.17.6