$ git clone -n https://src.fedoraproject.org/rpms/rust-sysinfo0.19.git /var/lib/mock/f40-build-2150968-50901/root/chroot_tmpdir/scmroot/rust-sysinfo0.19
Cloning into '/var/lib/mock/f40-build-2150968-50901/root/chroot_tmpdir/scmroot/rust-sysinfo0.19'...
$ git fetch origin cc91f163f1d306406bcdd928a2250bf828f14341:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-sysinfo0.19
 * [new ref]         cc91f163f1d306406bcdd928a2250bf828f14341 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc91f16 Regenerate with rust2rpm v24