$ git clone -n https://src.fedoraproject.org/rpms/rust-graphene-rs.git /var/lib/mock/f42-build-side-1-3589100-46953/root/chroot_tmpdir/scmroot/rust-graphene-rs
Cloning into '/var/lib/mock/f42-build-side-1-3589100-46953/root/chroot_tmpdir/scmroot/rust-graphene-rs'...
$ git fetch origin 9f57caae187773495648f288ba7325a92dde4d6e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-graphene-rs
 * [new ref]         9f57caae187773495648f288ba7325a92dde4d6e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f57caa Update to version 0.20.10; Fixes RHBZ#2365834