$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_factor.git /var/lib/mock/f41-build-side-1-2816514-32968/root/chroot_tmpdir/scmroot/rust-uu_factor
Cloning into '/var/lib/mock/f41-build-side-1-2816514-32968/root/chroot_tmpdir/scmroot/rust-uu_factor'...
$ git fetch origin 08b0c975ceaa224f0cc410ef874934bc121203e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_factor
 * [new ref]         08b0c975ceaa224f0cc410ef874934bc121203e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08b0c97 Update to version 0.0.27; Fixes RHBZ#2260212