$ git clone -n https://src.fedoraproject.org/rpms/rust-graphene-rs.git /var/lib/mock/f38-build-side-43-rust-devel-1400621-31152/root/chroot_tmpdir/scmroot/rust-graphene-rs
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1400621-31152/root/chroot_tmpdir/scmroot/rust-graphene-rs'...
$ git fetch origin 5a17da73f495c871f4588f5e163a2e0d1cbcbb17:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-graphene-rs
 * [new ref]         5a17da73f495c871f4588f5e163a2e0d1cbcbb17 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a17da7 Update to version 0.18.1; Fixes RHBZ#2224888