$ git clone -n https://src.fedoraproject.org/rpms/rust-scroll_derive.git /var/lib/mock/f45-build-44710-816/root/chroot_tmpdir/scmroot/rust-scroll_derive
Cloning into '/var/lib/mock/f45-build-44710-816/root/chroot_tmpdir/scmroot/rust-scroll_derive'...
$ git fetch origin 246b0fb2af29910478e0a55c157b0da4b3d72403:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-scroll_derive
 * [new ref]         246b0fb2af29910478e0a55c157b0da4b3d72403 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 246b0fb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild