$ git clone -n https://src.fedoraproject.org/rpms/rust-umask.git /var/lib/mock/f39-build-1517391-35724/root/chroot_tmpdir/scmroot/rust-umask
Cloning into '/var/lib/mock/f39-build-1517391-35724/root/chroot_tmpdir/scmroot/rust-umask'...
$ git fetch origin c2286b51372dcfafaf4eef057d9c7faa5b239709:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-umask
 * [new ref]         c2286b51372dcfafaf4eef057d9c7faa5b239709 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c2286b5 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild