$ git clone -n https://src.fedoraproject.org/rpms/nebula.git /var/lib/mock/f41-build-854380-166856/root/chroot_tmpdir/scmroot/nebula
Cloning into '/var/lib/mock/f41-build-854380-166856/root/chroot_tmpdir/scmroot/nebula'...
$ git fetch origin 2815e043beb9aaf3302f14fef98078e940f36fc2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nebula
 * [new ref]         2815e043beb9aaf3302f14fef98078e940f36fc2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2815e04 Fix vendored name