$ git clone -n https://src.fedoraproject.org/rpms/bochs.git /var/lib/mock/f40-build-801433-143784/root/chroot_tmpdir/scmroot/bochs
Cloning into '/var/lib/mock/f40-build-801433-143784/root/chroot_tmpdir/scmroot/bochs'...
$ git fetch origin f207f99e1c0d287425916f85e76f44f6bc8fcb8f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bochs
 * [new ref]         f207f99e1c0d287425916f85e76f44f6bc8fcb8f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f207f99 2.8