$ git clone -n https://src.fedoraproject.org/rpms/rust-print_bytes.git /var/lib/mock/f38-build-side-42-init-devel-1394867-31050/root/chroot_tmpdir/scmroot/rust-print_bytes
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1394867-31050/root/chroot_tmpdir/scmroot/rust-print_bytes'...
$ git fetch origin 6c595e8be605d7bbe5226fe19a479805ad365e03:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-print_bytes
 * [new ref]         6c595e8be605d7bbe5226fe19a479805ad365e03 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c595e8 Update to version 1.2.0; Fixes RHBZ#2186077