$ git clone -n https://src.fedoraproject.org/rpms/rust-detone.git /var/lib/mock/f45-build-41258-780/root/chroot_tmpdir/scmroot/rust-detone
Cloning into '/var/lib/mock/f45-build-41258-780/root/chroot_tmpdir/scmroot/rust-detone'...
$ git fetch origin 2cd16c638fa49f4d57c50aa7fdc200e86333bfd6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-detone
 * [new ref]         2cd16c638fa49f4d57c50aa7fdc200e86333bfd6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2cd16c6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild