$ git clone -n https://src.fedoraproject.org/rpms/rust-zstd-sys.git /var/lib/mock/f40-build-1848607-24974/root/chroot_tmpdir/scmroot/rust-zstd-sys
Cloning into '/var/lib/mock/f40-build-1848607-24974/root/chroot_tmpdir/scmroot/rust-zstd-sys'...
$ git fetch origin 0b2d02346a9e1162b792827e6a7cb838f57697ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zstd-sys
 * [new ref]         0b2d02346a9e1162b792827e6a7cb838f57697ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0b2d023 Update to version 2.0.12+zstd.1.5.6; Fixes RHBZ#2292666