$ git clone -n https://src.fedoraproject.org/rpms/rust-fdeflate.git /var/lib/mock/f40-build-2036328-48019/root/chroot_tmpdir/scmroot/rust-fdeflate
Cloning into '/var/lib/mock/f40-build-2036328-48019/root/chroot_tmpdir/scmroot/rust-fdeflate'...
$ git fetch origin 1e8976582bdc77445268b5b32bc864edc399d6fe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fdeflate
 * [new ref]         1e8976582bdc77445268b5b32bc864edc399d6fe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e89765 Update to version 0.3.1; Fixes RHBZ#2247354