$ git clone -n https://src.fedoraproject.org/rpms/rust-pest_derive.git /var/lib/mock/f39-build-2239059-53594/root/chroot_tmpdir/scmroot/rust-pest_derive
Cloning into '/var/lib/mock/f39-build-2239059-53594/root/chroot_tmpdir/scmroot/rust-pest_derive'...
$ git fetch origin b3fa7fe3abaff41f590025e4db728d893474a293:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pest_derive
 * [new ref]         b3fa7fe3abaff41f590025e4db728d893474a293 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3fa7fe Update to version 2.7.6; Fixes RHBZ#2240742