$ git clone -n https://src.fedoraproject.org/rpms/rust-phf_generator.git /var/lib/mock/f39-build-1526519-36074/root/chroot_tmpdir/scmroot/rust-phf_generator
Cloning into '/var/lib/mock/f39-build-1526519-36074/root/chroot_tmpdir/scmroot/rust-phf_generator'...
$ git fetch origin d6487937dab418f2c8230954a09e544d191d177b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-phf_generator
 * [new ref]         d6487937dab418f2c8230954a09e544d191d177b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d648793 Update to version 0.11.2; Fixes RHBZ#2107770