$ git clone -n https://src.fedoraproject.org/rpms/lxtask.git /var/lib/mock/f41-build-858153-168316/root/chroot_tmpdir/scmroot/lxtask
Cloning into '/var/lib/mock/f41-build-858153-168316/root/chroot_tmpdir/scmroot/lxtask'...
$ git fetch origin a78b0546f52a8ffd5bc081f51f2e1163b9d9d447:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxtask
 * [new ref]         a78b0546f52a8ffd5bc081f51f2e1163b9d9d447 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a78b054 Update to the latest git