$ git clone -n https://src.fedoraproject.org/rpms/R-mockr.git /var/lib/mock/f41-build-850810-165647/root/chroot_tmpdir/scmroot/R-mockr
Cloning into '/var/lib/mock/f41-build-850810-165647/root/chroot_tmpdir/scmroot/R-mockr'...
$ git fetch origin 91caaa6e1af03c183ba9514e91207fe8a69e7189:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-mockr
 * [new ref]         91caaa6e1af03c183ba9514e91207fe8a69e7189 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91caaa6 Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild