$ git clone -n https://src.fedoraproject.org/rpms/rust-ryu.git /var/lib/mock/f38-build-side-42-init-devel-1395137-31050/root/chroot_tmpdir/scmroot/rust-ryu
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1395137-31050/root/chroot_tmpdir/scmroot/rust-ryu'...
$ git fetch origin ef3658e26114a1609d62a91dc70e48c6e93fc3b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ryu
 * [new ref]         ef3658e26114a1609d62a91dc70e48c6e93fc3b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef3658e Update to version 1.0.15; Fixes RHBZ#2223137