$ git clone -n https://src.fedoraproject.org/rpms/maturin.git /var/lib/mock/f41-build-side-1-2828588-33537/root/chroot_tmpdir/scmroot/maturin
Cloning into '/var/lib/mock/f41-build-side-1-2828588-33537/root/chroot_tmpdir/scmroot/maturin'...
$ git fetch origin 1189faa52ef19a00b89a555ad63f44f23a3f9416:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maturin
 * [new ref]         1189faa52ef19a00b89a555ad63f44f23a3f9416 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1189faa Update to version 1.7.3