$ git clone -n https://src.fedoraproject.org/rpms/R-pkgcache.git /var/lib/mock/f41-build-821130-152418/root/chroot_tmpdir/scmroot/R-pkgcache
Cloning into '/var/lib/mock/f41-build-821130-152418/root/chroot_tmpdir/scmroot/R-pkgcache'...
$ git fetch origin c4fa4fb2c354bb080b2490a9b2028f2c49b81b14:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-pkgcache
 * [new ref]         c4fa4fb2c354bb080b2490a9b2028f2c49b81b14 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4fa4fb Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild