$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_du.git /var/lib/mock/f40-build-1971906-25224/root/chroot_tmpdir/scmroot/rust-uu_du
Cloning into '/var/lib/mock/f40-build-1971906-25224/root/chroot_tmpdir/scmroot/rust-uu_du'...
$ git fetch origin 743eb427226050094a409fa90a4212bbab8ef2d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_du
 * [new ref]         743eb427226050094a409fa90a4212bbab8ef2d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 743eb42 Update to version 0.0.27; Fixes: RHBZ#2260207