$ git clone -n https://src.fedoraproject.org/rpms/golang-modernc-xc.git /var/lib/mock/f40-build-2546305-61905/root/chroot_tmpdir/scmroot/golang-modernc-xc
Cloning into '/var/lib/mock/f40-build-2546305-61905/root/chroot_tmpdir/scmroot/golang-modernc-xc'...
$ git fetch origin 93e89a89801af8faddad1e8120364b64e1091afe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-modernc-xc
 * [new ref]         93e89a89801af8faddad1e8120364b64e1091afe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93e89a8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild