$ git clone -n https://src.fedoraproject.org/rpms/rust-cairo-sys-rs0.15.git /var/lib/mock/f40-build-2640073-66388/root/chroot_tmpdir/scmroot/rust-cairo-sys-rs0.15
Cloning into '/var/lib/mock/f40-build-2640073-66388/root/chroot_tmpdir/scmroot/rust-cairo-sys-rs0.15'...
$ git fetch origin 3779b83ad2c099432efeab483d51a5c056332f1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cairo-sys-rs0.15
 * [new ref]         3779b83ad2c099432efeab483d51a5c056332f1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3779b83 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild