$ git clone -n https://src.fedoraproject.org/rpms/libmypaint.git /var/lib/mock/f40-build-785523-133989/root/chroot_tmpdir/scmroot/libmypaint
Cloning into '/var/lib/mock/f40-build-785523-133989/root/chroot_tmpdir/scmroot/libmypaint'...
$ git fetch origin 652a06c5bfb6bbda5fe752c4f79299c4c32daab1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libmypaint
 * [new ref]         652a06c5bfb6bbda5fe752c4f79299c4c32daab1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 652a06c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild