$ git clone -n https://src.fedoraproject.org/rpms/rust-encoding_rs.git /var/lib/mock/f39-build-1517088-35683/root/chroot_tmpdir/scmroot/rust-encoding_rs
Cloning into '/var/lib/mock/f39-build-1517088-35683/root/chroot_tmpdir/scmroot/rust-encoding_rs'...
$ git fetch origin d2865a8b19ad5ad813bbde9ad4c98d7ef3aae2c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-encoding_rs
 * [new ref]         d2865a8b19ad5ad813bbde9ad4c98d7ef3aae2c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2865a8 Update to version 0.8.33; Fixes RHBZ#2233872