$ git clone -n https://src.fedoraproject.org/rpms/python-execnet.git /var/lib/mock/f40-build-2213626-52341/root/chroot_tmpdir/scmroot/python-execnet
Cloning into '/var/lib/mock/f40-build-2213626-52341/root/chroot_tmpdir/scmroot/python-execnet'...
$ git fetch origin b6b0e1084af81dac1f688316decdbbf8b21adb7c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-execnet
 * [new ref]         b6b0e1084af81dac1f688316decdbbf8b21adb7c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6b0e10 Introduce a bcond to drop eventlet and gevent BuildRequires