$ git clone -n https://src.fedoraproject.org/rpms/maturin.git /var/lib/mock/f38-build-side-42-init-devel-1258236-30642/root/chroot_tmpdir/scmroot/maturin
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1258236-30642/root/chroot_tmpdir/scmroot/maturin'...
$ git fetch origin ee89d6be9b207c7e579deebe6829fe745c756b40:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maturin
 * [new ref]         ee89d6be9b207c7e579deebe6829fe745c756b40 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ee89d6b Update to version 1.2.3; Fixes RHBZ#2229485