$ git clone -n https://src.fedoraproject.org/rpms/rust-cargo-util.git /var/lib/mock/f40-build-2259986-54393/root/chroot_tmpdir/scmroot/rust-cargo-util
Cloning into '/var/lib/mock/f40-build-2259986-54393/root/chroot_tmpdir/scmroot/rust-cargo-util'...
$ git fetch origin 53a4e262feff01ba063a4f02bd5f7fd00e5b755c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cargo-util
 * [new ref]         53a4e262feff01ba063a4f02bd5f7fd00e5b755c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53a4e26 Update to version 0.2.8; Fixes RHBZ#2256110