$ git clone -n https://src.fedoraproject.org/rpms/rust-speedate.git /var/lib/mock/f45-build-45166-821/root/chroot_tmpdir/scmroot/rust-speedate
Cloning into '/var/lib/mock/f45-build-45166-821/root/chroot_tmpdir/scmroot/rust-speedate'...
$ git fetch origin 301c9f464fc4c33083262dbe1a105d798a41f0e8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-speedate
 * [new ref]         301c9f464fc4c33083262dbe1a105d798a41f0e8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 301c9f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild