$ git clone -n https://src.fedoraproject.org/rpms/kcalc.git /var/lib/mock/f40-build-2315597-57940/root/chroot_tmpdir/scmroot/kcalc
Cloning into '/var/lib/mock/f40-build-2315597-57940/root/chroot_tmpdir/scmroot/kcalc'...
$ git fetch origin 2c58c8058d57c9b77fb5eea32060bffd94aa4216:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcalc
 * [new ref]         2c58c8058d57c9b77fb5eea32060bffd94aa4216 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c58c80 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild