$ git clone -n https://src.fedoraproject.org/rpms/cross-gcc.git /var/lib/mock/f41-build-side-1-2646013-27211/root/chroot_tmpdir/scmroot/cross-gcc
Cloning into '/var/lib/mock/f41-build-side-1-2646013-27211/root/chroot_tmpdir/scmroot/cross-gcc'...
$ git fetch origin e641a369dc63f9a7ae9fae262149b5590efcb215:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cross-gcc
 * [new ref]         e641a369dc63f9a7ae9fae262149b5590efcb215 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e641a36 update SPDX license string from the gcc package