$ git clone -n https://src.fedoraproject.org/rpms/maturin.git /var/lib/mock/f38-build-side-42-init-devel-1188650-30625/root/chroot_tmpdir/scmroot/maturin
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1188650-30625/root/chroot_tmpdir/scmroot/maturin'...
$ git fetch origin 4d1d53dee29bc8334091a6a723e7e7bd1ffb4cf3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maturin
 * [new ref]         4d1d53dee29bc8334091a6a723e7e7bd1ffb4cf3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d1d53d Update to version 1.1.0; Fixes RHBZ#2214007