$ git clone -n https://src.fedoraproject.org/rpms/rust-silver.git /var/lib/mock/f40-build-2123716-50762/root/chroot_tmpdir/scmroot/rust-silver
Cloning into '/var/lib/mock/f40-build-2123716-50762/root/chroot_tmpdir/scmroot/rust-silver'...
$ git fetch origin 9c60d3c01563f90ff334ba09ad0b2c4ce8a60147:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-silver
 * [new ref]         9c60d3c01563f90ff334ba09ad0b2c4ce8a60147 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c60d3c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild