$ git clone -n https://src.fedoraproject.org/rpms/erlang-hex_core.git /var/lib/mock/f40-build-2094976-50371/root/chroot_tmpdir/scmroot/erlang-hex_core
Cloning into '/var/lib/mock/f40-build-2094976-50371/root/chroot_tmpdir/scmroot/erlang-hex_core'...
$ git fetch origin e5dc39f00080a2c4462081ba21bb6c2145baa27b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-hex_core
 * [new ref]         e5dc39f00080a2c4462081ba21bb6c2145baa27b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e5dc39f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild