$ git clone -n https://src.fedoraproject.org/rpms/90-Second-Portraits.git /var/lib/mock/f40-build-2310254-57409/root/chroot_tmpdir/scmroot/90-Second-Portraits
Cloning into '/var/lib/mock/f40-build-2310254-57409/root/chroot_tmpdir/scmroot/90-Second-Portraits'...
$ git fetch origin 2cfc23c8759528b7a56c9944057839e774763300:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/90-Second-Portraits
 * [new ref]         2cfc23c8759528b7a56c9944057839e774763300 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2cfc23c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild