$ git clone -n https://src.fedoraproject.org/rpms/rust-compress-tools.git /var/lib/mock/f40-build-2657475-66916/root/chroot_tmpdir/scmroot/rust-compress-tools
Cloning into '/var/lib/mock/f40-build-2657475-66916/root/chroot_tmpdir/scmroot/rust-compress-tools'...
$ git fetch origin 9e1b3c372f292223e80d1239e1ff2e6dae7421c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-compress-tools
 * [new ref]         9e1b3c372f292223e80d1239e1ff2e6dae7421c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9e1b3c3 Backport upstream patch to port tests from encoding to encoding_rs