$ git clone -n https://src.fedoraproject.org/rpms/rust-below-store.git /var/lib/mock/f39-build-1744312-41383/root/chroot_tmpdir/scmroot/rust-below-store
Cloning into '/var/lib/mock/f39-build-1744312-41383/root/chroot_tmpdir/scmroot/rust-below-store'...
$ git fetch origin e1bdfc34060d57a53538a8fada5740450922f385:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-below-store
 * [new ref]         e1bdfc34060d57a53538a8fada5740450922f385 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1bdfc3 Update to 0.7.1