$ git clone -n https://src.fedoraproject.org/rpms/python-grabbit.git /var/lib/mock/f41-build-side-1-2922834-34961/root/chroot_tmpdir/scmroot/python-grabbit
Cloning into '/var/lib/mock/f41-build-side-1-2922834-34961/root/chroot_tmpdir/scmroot/python-grabbit'...
$ git fetch origin 2098634cf1b3026603e4d57575a54cec89700b20:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-grabbit
 * [new ref]         2098634cf1b3026603e4d57575a54cec89700b20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2098634 Unmaintained upstream: https://bugzilla.redhat.com/show_bug.cgi?id=2256958