$ git clone -n https://src.fedoraproject.org/rpms/rust-libgit2-sys0.12.git /var/lib/mock/f40-build-2325638-58813/root/chroot_tmpdir/scmroot/rust-libgit2-sys0.12
Cloning into '/var/lib/mock/f40-build-2325638-58813/root/chroot_tmpdir/scmroot/rust-libgit2-sys0.12'...
$ git fetch origin 54315ab4e860e5b01942377f6ec62398ced61b77:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libgit2-sys0.12
 * [new ref]         54315ab4e860e5b01942377f6ec62398ced61b77 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 54315ab Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild