$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_ptx.git /var/lib/mock/f40-build-1971930-25224/root/chroot_tmpdir/scmroot/rust-uu_ptx
Cloning into '/var/lib/mock/f40-build-1971930-25224/root/chroot_tmpdir/scmroot/rust-uu_ptx'...
$ git fetch origin 0ec93991f29b602f65e24a1d900eb459a22031b2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_ptx
 * [new ref]         0ec93991f29b602f65e24a1d900eb459a22031b2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ec9399 Update to version 0.0.27; Fixes: RHBZ#2260234