$ git clone -n https://src.fedoraproject.org/rpms/maturin.git /var/lib/mock/f41-build-843207-161922/root/chroot_tmpdir/scmroot/maturin
Cloning into '/var/lib/mock/f41-build-843207-161922/root/chroot_tmpdir/scmroot/maturin'...
$ git fetch origin e956a5ba5d3e450d809b52a969b019843d033e4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maturin
 * [new ref]         e956a5ba5d3e450d809b52a969b019843d033e4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e956a5b Update to version 1.7.0; Fixes RHBZ#2296221