$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_head.git /var/lib/mock/f40-build-774737-127736/root/chroot_tmpdir/scmroot/rust-uu_head
Cloning into '/var/lib/mock/f40-build-774737-127736/root/chroot_tmpdir/scmroot/rust-uu_head'...
$ git reset --hard 840f4f676cdf0426190f4918b92f7a08becd7180
HEAD is now at 840f4f6 Initial package (rhbz#2258130)